British headphone designer RHA has recently released two new pairs of in-ear headphones aimed at iOS device users. Its MA600i ($90) and MA750i ($130) both use a combination of metal and plastic, resulting in very handsome-looking audio accessories. The less expensive of the two is constructed from aluminum, while the other uses stainless steel. One of the big differences between the two is the over-ear memory wires on MA750i, which typically aren't…
